[" (1) Find a mmber suck that whell "15" is sisteracted toom "7],[" times the mumber ithe sesult is "10" moul then twice the "],[" would "]

Find a number such that when 15 is subtracted from 7 xx the number,the result is 10 more than twice the number.

Find two numbers, which differ by 7, such that twice the greater added to five times the smaller makes 42.

Find two numbers, which differ by 7, such that twice the greater added to five times the smaller makes 42.

The sum of twice of a number and 7 times its reciprocal is 15. The number is

Evaluate : 15 5/7 times 15 2/7

(i) 6 times the 6th term of an A.P. is equal to 10 times the 10th term. Prove that its 16th term will be zero. (ii) 10 times the 10th term of an A.P. is equal to 15 times its 15th term. Find its 25th term.

Find the number of significant figures in the 2.520 xx 10^7

Find the number of significant figures in the 2.520 xx 10^7

Difference between two numbers is 30. Twice the greater number is less than 7 times the smaller number by 5. Find the numbers.

Difference between two numbers is 30. Twice the greater number is less than 7 times the smaller number by 5. Find the numbers.