9/5 × 18/25 ÷ 42/21 = ? - 82/75
(7/4×18/21)+ (51/7× 28/17) + (25/2 × 48/10) =?
? (1/2) = 236 – 25 × 18/2 + 396 ÷ 22
√(?) = (897 × 51) ÷ 1016.6
52% of 36% of 810 = 72% of 18% of ?
Find the value of {(3125) (n/5) × 5 (2n + 2) }/ {25 n × 5 (n - 1) }
60% of 120 – ?% of 64 = 20% of 200
150% of ? + 280 ÷ 35 = 132 - 122 + 7
Find the unknown value of' x' in the proportion $$(5x + 1) : 3 = (x + 3) : 7
75% of 65% of 7/5 of 2420 = ?
