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Required number of ways = 10C4 We know that nCr = n! ÷ [(n - r) ! X r!] = 10! ÷ [(10 - 4) ! X 4!] = 10! ÷ (6! X 4!) = 210
When a number is increased by 20% then the number obtained is 72 less than thrice the original number. Find the original number.
Determine the unit digit of the product: 785×6194×319×1296
The number 611611611611611611611 is
Find the smallest 4 digit number that is completely divisible by both 24 and 44.
If 1/7 of a number is subtracted from the number, the result is 30 less than the number. Find the number.
A number lies between the cubes of 13 and 14. If the number is divisible by 6 as well as square of 16. Find the number.