Page 4 - CBQ-CL-6-CH-3 NUMBER PLAY

subtracting leads to 6174.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.
(d) A is false, but R is true.

12 The time now is 02:15. How many minutes until the clock shows the next palindromic time?
What about the one after that?

13 What is the sum of the smallest and largest 5-digit palindrome? What is their difference?

14 Digit sum 18.

(a) Write other numbers whose digits add up to 18.
(b) What is the smallest number whose digit sum is 18?

(c) What is the largest 5-digit number whose digit sum is 18?
(d) How big a number can you form having the digit sum 18? Can you make an even bigger number?

15 Check if the Collatz Conjecture holds for the given numbers: 35, 22, 19, 18.

16. Estimate the following:
(a) 730 + 998 (b) 796 – 314 (c) 958 × 387 (d) 765 ÷ 95

ANS 1. True

2. False

3. True

4.(a) 59

5. (a) 111

6. larger

7.10 times

8.(i) (a) Hourly Sequence
(ii) b) It helps in planning and scheduling.
(iii) (b) Numbers are arranged in a circular manner.
(iv) The circular arrangement of numbers on a clock allows us to see the progression of time
throughout the day. This arrangement helps us track time intervals, understand the passing of
hours, and manage our daily schedules effectively. By observing the positions of the hour and
minute hands, we can calculate elapsed time and plan our activities.
9.(i) (c) It reads the same forwards and backwards.

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