Mathematical operation and symbol notation
Direction: In these question, relationship between different element is shown in the statements. These statements are followed by two conclusions.
 Statements:
N = P, P < F, F > L, L = k
Conclusions:
I. F = K II. F > K

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N = P ≤ F ≥ L = K
Hence F ≥ K. Which means either
I (F = K) or II (F > K) followsCorrect Option: C
N = P ≤ F ≥ L = K
Hence F ≥ K. Which means either
I (F = K) or II (F > K) follows
 If + stands for division; x stands for addition;  stands for multiplication, ÷ stands for subtraction, Which of the following is correct ?

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25 ÷ 3 x 7  8 + 12 = 19.3
Correct Option: D
25 ÷ 3 x 7  8 + 12 = 19.3
 After interchanging + and , 8 and 7, which one of the following becomes correct ?

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After changing '+' and '' , 8 and 7 the appropriate equation is,
6 + 8 x 2  7 = 0
L.H.S. = 6  7 x 2 + 8
6  14 + 8
14  14 = 0 = R.H.S.Correct Option: C
After changing '+' and '' , 8 and 7 the appropriate equation is,
6 + 8 x 2  7 = 0
L.H.S. = 6  7 x 2 + 8
6  14 + 8
14  14 = 0 = R.H.S.
 If, + stand for division; x stands for addition; stands for multiplication; ÷ stands for subtraction, which of the following is correct ?

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After changing '+' = ÷ , '' = x
'x' = '+' '÷' = 
the equation, 46  6 + 4 x 5 ÷ 3 = 71
CHS = 46 x 6 ÷ 4 + 5  3
= 276 ÷ 4 + 5  3
= 69 + 5  3
= 74  3 = 71 R.H.S.Correct Option: B
After changing '+' = ÷ , '' = x
'x' = '+' '÷' = 
the equation, 46  6 + 4 x 5 ÷ 3 = 71
CHS = 46 x 6 ÷ 4 + 5  3
= 276 ÷ 4 + 5  3
= 69 + 5  3
= 74  3 = 71 R.H.S.
 Which sequence of mathematical symbols can replace *in the given equation to balance the equation ?
7 * 7 * 2 * 1 = 12

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Given, 7 * 7 * 2 * 1 = 12
Let us check all the options one by one.Correct Option: B
Given, 7 * 7 * 2 * 1 = 12
Let us check all the options one by one.
From option (a), putting the signs in given equation, we get
7 x 7  2 ÷ 1 = 12 ⇒ 7 x 7  2 = 12
⇒ 49  2 = 12 ⇒ 47 = 12
⇒ LHS ≠ RHS
So, option (a) is incorrect.
From option (b), putting the signs in given equation, we get
7 + 7  2 x 1 = 12 ⇒ 7 + 7  2 = 12
⇒ 14  2 = 12 ⇒ 12 = 12
Hence, option (b) is correct and there is no need to check remaining options .