Page 78 - Math Genius C5

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\\October 8, 2025 12:13 PM Bharat Arora P-9 Reader _________________________ Date: ___________________74

Chapter assessment

1. tick () the correct option.

( a) Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12

seconds respectively. In 30 minutes, how many times do they toll together?
(i ) 4 (ii ) 10 (iii ) 15 (iv) 16

( b) The least number which should be added to 2497 so that the sum is exactly
divisible by 5, 6, 4 and 3 is:

(i ) 13 (ii ) 23 (iii ) 33 (iv) 3

( c) Reema, Neema and Siya start to run at the same time in the same direction
around a circular stadium. Reema completes a round in 308 seconds, Neema in

198 seconds and Siya in 252 seconds, all starting from the same point. After how
much time will they meet again at the starting point?

(i ) 45 min (ii ) 42 min 36 sec

(iii ) 45 min 12 sec (iv) 46 min 12 sec

2. Atul has prepared 72 cupcakes in 4 different flavours with each flavour having an
equal number of cupcakes. He wanted to arrange them in a rectangular box such that

each flavoured cupcake comes in every row, without repetition. In how many rows
can he arrange the cupcakes to meet this requirement?

3. Aanaya wanted to arrange 36 plants of four different varieties in a rectangular area

surrounded by a fence with each row having the same type of plants. How many
plants will be planted in each row? Why are plants important to us?

4. Change the position of any two digits in the number 527253 such that the number

formed will be divisible by 11.

5. Three children start off together for a morning walk around a circular track. Their
steps measure 40 cm, 50 cm and 60 cm respectively. At what distance from their

starting point will the three children meet again? Why are morning walks important
for everyone?

6. Rohan’s father has bought a new house and he wants to renovate the living room. The

living room is 6 m 70 cm long and 3 m 50 cm wide. What are the dimensions of the
largest square tile that can be fixed on the floor so that the tiles need not be cut to

fit the floor? CoMPeteNCy-BASed QUeStIoN

76 Mathematics-5