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In this type, you are provided with substitutes for various mathematical symbols, followed by a question involving calculation of an expression or choosing the correct / incorrect equation. The candidate is required to put in the real signs in the given equation and then solve the questions as required. Note: - While solving a mathematical expression, proceed according to the rule BODMAS – i.e. Brackets, Of, Division, Multiplication, Addition, Subtraction.

Problem-Solving By Substitution , Mathematical Operations

If × stands for 'addition', ÷ stands for 'subtraction', + stands for 'multiplication' and - stands for 'division', then 20 × 8 ÷ 8 - 4 + 2 = ?
Option :
A. 80
B. 25
C. 24
D. 5

If - means ×, × means +, + means ÷ and ÷ means -, then 40 × 12 + 3 - 6 ÷ 60 = ?
Option :
A. 7.95
B. 16
C. 44
D. 479.95
E. None of these

If + means ÷, × means -, ÷ means × and - means+, than 8 + 6 × 4 ÷ 3 - 4 = ?
Option :
A. -12
B. - 20/3
C. 12
D. 20/3
E. None of these

If × means ÷, - means ×, ÷ means + and + means-, than (3 - 15 ÷ 19) × 8 + 6 = ?
Option :
A. 8
B. 4
C. 2
D. -1

If + means ×, ÷ means -, × means ÷ and - means +, what will be the value of 4 + 11 ÷ 5 - 55 = ?
Option :
A. - 48.5
B. - 11
C. 79
D. 91
E. None of these