Question

find the value of (2@5@1)@3 such that @ means adding 5 times first number to the second number

Answer 1

(2@5@1)@3
As '@' means adding 5 times first number to the second number
2@5=5+5×2
=15
Now
(2@5@1)@3
=(15@1)@3
=(1+5×15)@3
=76@3
=3+5×76
=383
So (2@5@1)@3=383
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