Practice example for bebras- std 5 & 6

Bebras India Computational Thinking Challenge 19-30 November2018 This work is licensed under a Creative Commons Attribution 4.0 International License.

Instructions: TM Before the Challenge • Create a new folder on each computer with the name School UDISE code • Download the attached file : Bebras Challenge 2018-APSWR.xls in the created folder • This file needs to be run on each computer and will keep storing the responses automatically for each student in a separate Excel file on the folder. 2

Instructions: TM • Duration 45 minutes 3 • Student to enter the Student User Id from the list downloaded • Please select correct standard and div • Enter student name • Options are given for all questions • The excel sheet will automatically save the responses

Points A category questions: B category questions: C category questions: +6 points for each +9 points for each +12 points for each correct answer correct answer correct answer 0 points for no answer 0 points for no answer 0 points for no answer 0 points for each -2 points for each -4 points for each incorrect answer incorrect answer incorrect answer 4

Bebras India Challenge Brahmagupta ( Standards 5 & 6) This work is licensed under a Creative Commons Attribution 4.0 International License. 5

Brahmagupta ( Standards 5 & 6) Number Question Difficulty 6 A1 Flowerbed Easy A2 Simon Says Easy A3 Bird Colors Easy A4 Football Easy A5 Flowers Easy B1 Ring Toss B2 Rubbish Robots Medium B3 Robots Medium B4 Infinite Ice-cream Medium B5 What will Maya wear today? Medium C1 Village Words Medium C2 Magical Bridges Hard C3 Lemon Sherbet Party Hard C4 Soundex Hard C5 Resort Binary Hard Hard

Brahmagupta-A1: Flowerbed The gardener planted flowers in three rows. He planted 4 flowers in each row. He had been told that in each row the white flower should be closer to the fence than the blue flower. Question: Which rows are planted according to the instructions? A) Only 1 B) 1 and 2 C) 1 and 3 D) All 7

Brahmagupta-A2: Simon Says Here is a simple push square game. The colours rotate every time the centre button is pressed Question: If we push the button one more time, where would you place the red, blue, green and yellow? A) B) C) D) 8

Brahmagupta-A3: Bird Colours Mithoo, the Australian Rainbow Parrot, has had four chicks (baby parrots). Each young parrot has four colours: red, blue, green and yellow. Each colour in a chick must be located in a different part of the body as compared to the other chicks. Question: Based on the first three chicks, what colour patterns will the fourth have? 9

Brahmagupta-A4: Football The students want to play football during P.T. period. However, there are several things to consider: • The students can only play football on a sunny day. • An outdoor activity is only allowed when the wind speed is lower than 20 km/h. • The school ground can’t be used if another class has already reserved it on that day. Monday Tuesday Wednesday Thursday Friday Weather Forecast for next week Weather Condition Wind Speed 5 km/h 24 km/h 13 km/h 7 km/h 40 km/h School ground Reservations Class Monday Tuesday Wednesday Thursday Friday for next week VIA --- - Question: 10 When can the students play football next week? A. Tuesday B. Wednesday C. Thursday D. Friday

Brahmagupta-A5: Flowers A flower shop sells tube roses, lilies, tulips and roses. All the flowers are available in white, yellow and blue. Chitra wants a bunch of six flowers. She tells the florist (the person selling flowers) that: • There must be two of each of the colours yellow, white and blue. • Flowers of the same type must not have the same colour, • Every type of flower should only appear, at most, twice. Question: Which of the following bunches will Chitra choose? A) B) C) D) 11

Brahmagupta-B1: Ring Toss Sonia plays Ring Toss. She throws five rings around a pole. Every ring that successfully lands around the pole scores points. Any ring that misses the pole wins no point. First Throw Second Throw Third Throw Fourth Throw Fifth Throw 5 43 21 Question: Sonia threw her five rings as shown. How many points did she get? A) 9 B) 6 C) 5 D) 7 12

Brahmagupta-B2: Rubbish Robots The picture shows the map of a garden divided into squares. The number in each square is the number of chocolate wrappers left there by visitors. The staff have two robots, Anton and Boris, who collect all the wrappers they find in every square they enter. The robots were given the following (Upwards, Upwards, Left) instructions for movement: First, Anton was sent and when he finished, Boris was sent. Question: How many chocolate wrappers will Boris collect? A) 3 B) 9 C) 11 D) 12 13

Brahmagupta-B3: Robots Here are five statements describing the three robots: 1. Teena and Meena are smiling. 2. Teena, Meena and Leena each have two legs. 3. Meena has a round head and Leena has two legs. 4. All three robots have five fingers. 5. Leena or Teena have their hands raised. Question: Which of these five statements are true? A) 2 and 3 B) 1 and 3 C) 1 and 5 D) None 14

Brahmagupta-B4: Infinite Ice-cream An ice-cream seller uses the Ice Cream Flavors following instructions to make BC ice-cream: 1. Start with an empty cone. 2. Pick a flavour at random, and add two scoops of that flavour. 3. Add one scoop of a different flavour. 4. If the requested number of A D scoops is reached, stop, otherwise go to Step 2. 15 Question: Which one is NOT made by the seller? AB C B

Brahmagupta-B5: What will Maya wear today? 16 Every day in the morning Maya uses the following rules to decide what to wear: • If she wears trousers, then she wears a T-shirt that is blank or has stars. • If she wears a skirt, then she wears a T-shirt with a squirrel. • If she wears a T-shirt that is blank or has stars, then she wears a jacket with a heart. • If she wears a jacket with a heart, then she wears a cap with a drawing Question: Which of the following combinations can Maya wear? A) B) C) D)

Brahmagupta-C1: Village Words Words used in a village have the following characteristics; - They use only three different characters - A correct word reads the same backward as forward. Examples of the correct words are shown: The length of a word is the number of characters used. For example, the length of is 3 Question: 17 How many correct words can be made with length of 3? A) 6 B) 9 C) 18 D) 27

Brahmagupta-C2: Magical Bridges This is Mahi This is Jai Mahi can drop either a carrot or a fish in one of the waterfalls 18 numbered 1, 2 or 3. There are several magical bridges on the stream. The items that pass under bridges magically change. Example: In this magical bridge, when a carrot passes under the bridge, it changes to a fish. Similarly, changes at other bridges are shown. Question: Mahi wants to send Jai a piece of wood. Which item should Mahi drop and where should she drop it? A) Drop a fish down waterfall 1 B) Drop a carrot down waterfall 2 C) Drop a fish down waterfall 2 D) Drop a carrot down waterfall 3

Brahmagupta-C3: Lemon Sherbet Party Janvi made 37 litres of Lemon 1 litre 2 litre Sherbet at home and now she wants 4 litre 8 litre to take it to school for a 16 litre celebration. She has several empty bottles of different sizes but she wants to use the minimum number of them. 1 litre 2 litre 4 litre 8 litre 16 litre 32 litre 32 litre Question: What is the minimum number of bottles that Janvi needs? A) 2 B) 3 C) 4 D) 5 19

Brahmagupta-C4: Soundex Bablu wants to know how different words sound. Letters Numerals He does the following steps in order to generate B, F, P, V 1 Code B100 a 4-digit code for each word: C, G, J, K, Q, S, X, Z 2 B160 H416 1. Retain the first letter of the word. D,T 3 E200 2. Drop all occurrences of 'A', E', 'I', 'O', 'U', 'H', L 4 20 'W', 'Y'. 3. Change letters to numbers as shown on right. M, N 5 4. Replace two or more identical numbers occurring R 6 together with the same single number. Word 5. Use only the first four digits of the resulting word, adding zeros at the end as necessary. BOB For Example: BEAVER HEILBRONN ESSAY Question: What code will be generated by the word “HILBERT”? A) H410 B) B540 C) H041 D) H416

Brahmagupta-C5: Resort Binary Madhuri is working at a Resort. Some cottages are already numbered, as you can see. She has to hang new numbers on the doors of the cottages. Starting at cottage number 50, the rules are: • if the new number is less than the cottage number in front of her, she goes left • if the new number is greater than the cottage number in front of her, she goes right • if the cottage in front of her does not have a number, hang the new number on its door. Question: 21 Madhuri needs to hang the number 29. Following these rules, which cottage should have the number 29? A / B / C /D ?

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