Q. 3 A5.0( 1 Vote )
Find out the larger product of each pair below, without actual multiplication.
25 × 75, 26 × 74
Answer :
Using identity 
- 
25 × 75 = (50-25)(50+25) = 
- 
26 × 74 = (50- 24)(50+24)= 
- 
clearly 26 × 74 is the larger product
since in this we are subtracting 
from 
whereas in 25 × 75 we are subtracting 
from 
.
example- (10-5) and (10-4)
(10-4) is larger since we are subtracting 4 from 10 whereas we are subtracting 5 from 10 in (10-5).
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