Page 63 - Revised Maths Wisdom Class - 6

Number Play 61

2. A 3-digit number ‘909’ then its digit sum is equal to:

(a) 18 (b) 9 (c) 19 (d) None of these
3. How many digits are in Kaprekar constant?
(a) 5 (b) 3 (c) 4 (d) None of these
4. Four digits 4, 7, 2, 3 are given then the difference between the largest four digit and smallest four digit
number is:
(a) 5085 (b) 5805 (c) 5058 (d) None of these

5. Sum of the smallest and largest 5-digit Palindrome number is:
(a) 270000 (b) 190000 (c) 110000 (d) None of these

C Fill in the Blanks Fill in the Blanks
1. The number read the same from left to right and from right to left such a number are called __________.

2. Which number is called ‘Kaprekar constant’ _________.
3. The smallest 2-digit number whose digit sum is 11 _____________.

D Write ‘t’ FOr true and ‘F’ FOr False stateMents Write ‘t’ FOr true and ‘F’ FOr False stateMents

1. Numbers having four digits are 9000

2. 5 digit number –2 digit number = 3 digit number

3. Number ‘6184’ is called as magic number of Kaprekar.

4. Denote a Palindromic number (of any digits) as x reverse the number to get y will the difference between x
and y always be zero.

E Case study Based QuestiOns Case study Based QuestiOns
Ankit love to play game with numbers. He observes the numbers written 2430 7500 7350 9870
in the table below. A cell becomes a supercell if the number in it is greater
than all the numbers in its neighbouring cells. 3115 4795 9124 9230

Answer the following questions on the basis of above data: 4580 8632 8280 3446
5805
6034
5785
1944
1. How many super cell in the table?
(a) 4 (b) 5 (c) 6 (d) 7
2. What is the difference between largest and smallest number?
(a) 2679 (b) 7926 (c) 9267 (d) 2976
3. The smallest even number in the table is ______.
(a) 2430 (b) 5785 (c) 1944 (d) 3446

4. How many numbers are there in between 1000–5000?
(a) 4 (b) 5 (c) 6 (d) 7