1.Before being simplified,the instructions for computing income tax in Country Rwere to add 2 percent of one's annual income to the average(arithmetic mean)of 100units of Country R's currency and 1 percent of one's annual income.Which of the following represents the cimplified formula for computing the income tax,in Country R's currency,for a person in that country whoses annual income is I?
A 50+I/200 B 50+3I/100 C 50+I/40 D 100+I/50 E100+3I/100
answer is C
2.For every positive even integer n,the function h(n) is defined to be the product of all the even integers from 2 to n.If p is the smallest prime factor of h(100)+1,then p is ?
A between 2 and 10 B between 10 and 20 C between 20 and 30 D between 30 and 40 E greater than 40
Answer is E
1.Before being simplified,the instructions for computing inc
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Second is an easy one
h(100) will be 2 * 4 * 6 * 8 .... 100
= 2^50 (1 * 2 * 3 ... 50)
= 2^50 * 50!
This h(100) will be divisible by all numbers from 1 to 50
adding 1
h(100) + 1 will not be divisible by any number from 1 to 50
hence smallest prime factor will be greater than 50
so answer is E
Do let me know if you need detailed explanation
h(100) will be 2 * 4 * 6 * 8 .... 100
= 2^50 (1 * 2 * 3 ... 50)
= 2^50 * 50!
This h(100) will be divisible by all numbers from 1 to 50
adding 1
h(100) + 1 will not be divisible by any number from 1 to 50
hence smallest prime factor will be greater than 50
so answer is E
Do let me know if you need detailed explanation
First question has tricky language.
Read it carefully it will be a cakewalk
Lets try.
Total income is I.
we need to add next part to this
which shall be I/100
now average will be
(100 + I/100) / 2
50 + I/200
Now the result will be
I/50 + 50 + I/200
=50 + 5I/200
=50 + I/40
Hope its clear now
Read it carefully it will be a cakewalk
Lets try.
Total income is I.
2% of income will be 2I/100 = I/501.Before being simplified,the instructions for computing income tax in Country Rwere to add 2 percent of one's annual income
we need to add next part to this
We need to take average ofto the average(arithmetic mean)of
100 and
100units of Country R's currency
1% of income
and 1 percent of one's annual income.
which shall be I/100
now average will be
(100 + I/100) / 2
50 + I/200
Now the result will be
I/50 + 50 + I/200
=50 + 5I/200
=50 + I/40
Hope its clear now
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- Junior | Next Rank: 30 Posts
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