IF, 2 X 3 X 4 = 216, 5 X 6 X 7 = 153,7 X 8 X 9 = 141, So, 2 X 5 X 7 = ...?...

 Answer:- 376
Solution:-
(1) 2 X 3 Χ 4 = 216,
Step 1:- right above numbers in revers direction like these,  432
Step 2:- than divide first number = 432/2=216
(2) 5 X 6 X 7 = 153,
Step 1:- right above numbers in revers direction like these,  765
Step 2:- than divide first number = 765/5=153
(3)    7 X 8 X 9 = 141,
Step 1:- right above numbers in revers direction like these,  987
Step 2:- than divide first number = 987/7=141
(4) 2 X 5 X 7 = 376,
Step 1:- right above numbers in revers direction like these,  752
Step 2:- than divide first number = 752/2=376
You can download solution PDF file = Solution.pdf