Find the value of `2+ (-3) + 4 + ( -5 ) + 6`

Find the value of : 6-3-(-5) .

If ? is an operation on integers such that a ? b= -a+b-(-2) for all integers a , b . Find the value of : (i) 4 ? 3 (ii) (-2) ? (-3) (iii) 6 ? (-5) (iv) (-5) ? 6

Find the value of 5C_3 + 4C_2

Find the value of ? 3 , 2 =7 5 , 4 =23 7 , 6 = 47 9 , 8 = 79 10 , 9 = ?

If the mean of the following distribution is 6, find the value of p. x: 2 4 6 10 p+5 f: 3 2 3 1 2

Find the value of : 5a^2-3a+4 for a=3

Find the value of x , if x :6::5:3

Find the value of 5 5/6 \div 3 1/2 .

Find the value of : (i) 2^6 (ii) 9^3 (iii) 11^2 (iv) 5^4

Find the value of 2.2 + 4.08 + 3.125 + 6.3755.