`23.143 + 17.159 = "_____"`.

Q. 159 to 171

149 : 238 : : 159 : ? .

3 5 10 12 17 23 24

121 138 159 184 213 ?

If 143 xx 7 xx 1 = 1001 143 xx 7 xx 2 = 2002 then 143 xx 7 xx 7 = .......

13, 17, 19, 23, 27, 31

23, 27, 43, 79, 143, ….

What should come in place of the question mark (?) in the following questions: 2234 + 84-1273 = ?+ 123. Options are (a) 922 (b) 932 (c) 159 (d) 143 .

What is the value of [(2.3)^(3) – (1.7)^(3)] / [(2.3)^(2) + (2.3 xx 1.7) + (1.7)^(2)] ?