SSC JE Civil Engineering 30-Oct-2020 Shift 2 Paper

21 ÷ 3 - 35 + 7 × 28 = 224
(I) 21 ÷ 3 - 35 + 7 × 28 = 224
Interchanging ( × ) and ( - ) and applying BODMAS rule,
21 ÷ 3 × 35 + 7 - 28 = 224
7 × 35 + 7 - 28 = 224
245 + 7 - 28 = 224
252 - 28 = 224
224 = 224.
LHS = RHS.
(II) 21 ÷ 3 - 35 + 7 × 28 = 224
Interchanging ( + ) and ( × ) and applying BODMAS rule,
21 ÷ 3 - 35 × 7 + 28 = 224
7 - 35 × 7 + 28 = 224
7 - 245 + 28 = 224
7 - 217 = 224
-210 ≠ 224.
LHS ≠ RHS.(III) 21 ÷ 3 - 35 + 7 × 28 = 224
Interchanging ( ÷ ) and ( × ) and applying BODMAS rule,
21 × 3 - 35 + 7 ÷ 28 = 224
21 × 3 - 35 + 0.25 = 224
63 - 35 + 0.25 = 224
63 - 34.75 = 224
28.25 ≠ 224.
LHS ≠ RHS.
(IV) 21 ÷ 3 - 35 + 7 × 28 = 224
Interchanging ( - ) and ( ÷ ) and applying BODMAS rule,
21 - 3 ÷ 35 + 7 × 28 = 224
21 - 0.0857 + 7 × 28 = 224
21 - 0.0857 + 196 = 224
217 - 0.0857 = 224
216.9143 ≠ 224.
LHS ≠ RHS.Hence, the correct answer is "× and -".