7 x ? =29.05

The unit’s digit in the product 274 x 318 x 577 x 313 is :

(1331)^-2 ÷ (14641)^-3 = (11)^? * (121)

Two numbers, both greater than 29, have H.C.F. 29 and L.C.M. 4147. The sum of the numbers is:

In some code, letters a, b, c, d and e represents numbers 2, 4, 5, 6 and 10. We just don't know which letter represents which number. Consider the following relationships:
i)   a + c = e,
ii)  b - d = d and
iii) e + a = b
Which statement below is true?

Which of the following number is divisible by 24 ?

1000¹⁰ ÷ 10²⁸ = ?

The ratio of two numbers is 3: 4 and their H.C.F is 4, Their L.C.M is:

If a*b=a2+b2 then 3*5 is equal to

A fraction, which bears the same ratio to 1/27, that 3/11 dose to 5/9 , is equal to