O 21 and 69
Which one of the following interchanges of numbers would make the given equation correct?
69 + 23 x 6 + 21 - 5 = 30
O 23 and 6
5 and 6
O 23 and 5
Clear
Next
Answers
SOLUTION
TO CHOOSE THE CORRECT OPTION
Which one of the following interchanges of numbers would make the given equation correct
69 ÷ 23 × 6 + 21 - 5 = 30
- 23 and 6
- 5 and 6
- 23 and 5
- 21 and 69
EVALUATION
Here the given expression is
69 ÷ 23 × 6 + 21 - 5 = 30
LHS
= 69 ÷ 23 × 6 + 21 - 5
= 3 × 6 + 21 - 5
= 18 + 16
= 34
≠ 30
CHECKING FOR OPTION : 1
If we interchanges the numbers 23 and 6
The given expression becomes
69 ÷ 6 × 23 + 21 - 5 = 30
But clearly 69 ÷ 6 × 23 + 21 - 5 ≠ 30
So this option is not correct
CHECKING FOR OPTION : 2
If we interchanges the numbers 5 and 6
The given expression becomes
69 ÷ 23 × 5 + 21 - 6 = 30
LHS
= 69 ÷ 23 × 5 + 21 - 6
= 3 × 5 + 21 - 6
= 15 + 15
= 30
So this option is correct
CHECKING FOR OPTION : 3
If we interchanges the numbers 23 and 5
The given expression becomes
69 ÷ 5 × 6 + 21 - 23 = 30
But clearly 69 ÷ 5 × 6 + 21 - 23 ≠ 30
So this option is not correct
CHECKING FOR OPTION : 4
If we interchanges the numbers 21 and 69
The given expression becomes
21 ÷ 23 × 6 + 69 - 5 = 30
But clearly 21 ÷ 23 × 6 + 69 - 5 ≠ 30
So this option is not correct
FINAL ANSWER
Hence the correct option is 5 and 6
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