100 x 10 -100+2000÷100 =?

2 1/9 * 1 2/19 ÷ 2 ? =?-1½

If a * b – 2a – 3b + ab, then 3 * 5 + 5 * 3 is equal to:

If x = (7 - 4√3),then the value of (x + 1/x) is:

If 4x + 3y = 18xy and 2x – 5y + 4xy = 0, then the value of x and y will be respectively:

74x 25-33x 45=?

By how much does √12 + √18 exceed √3 + √2 ?

749 -325 -124 / 1254 – 1100 =?

If 0 < a< 1, then the value of a + 1/a is:

2.002 + 7.9 {2.8 – 6.3 (3.6 – 1.5) + 15.6} = ?