Problem Solving

47 thingamajigs cost $1_8._7. Then what does each thingamajig cost, where numbers at "_" are not visible or are written in illegible hand?
(A) $2.31
(B) $2.44
(C) $3.21
(D) $3.23
(E) $3.51

sanju09 wrote:47 thingamajigs cost $1_8._7. Then what does each thingamajig cost, where numbers at "_" are not visible or are written in illegible hand?
(A) $2.31
(B) $2.44
(C) $3.21
(D) $3.23
(E) $3.51

The last digit of total cost is 7; since 47*Price = $1_8._7

The last digit of the price should be 1 or 3 (B is Ruled out)

Now plugging the answers back 2.31*47 = 108.57

So - A

Couldn't think of anything better

Hi, Since the last digit of the amount is 7 and the number of things is 47, using number properties..Last digit has to be 1.

7*1=7
7*7=.9
7^3=..3
7^4=...1
7^5=...7

Now A,C and E are the contenders.. Started with A, 47*2.31 = 108.37

However I think there is more that can be narrowed down...how to choose between $2 and $3??

IMO A

This question is weird as there are 2 possible answers. So question has definitely missed some more piece of information.


A and C could be the answers .

A = 2.31 * 47 = 108.57--->satisfies the condition given

C = 3.21 * 37 = 118.77--->satisfies the condition given.

You cant have 2 correct answers .

Thus this question either misses some information or the answer choices are not transcribed properly or ELSE something is really illegible to me here

rohan_vus wrote:This question is weird as there are 2 possible answers. So question has definitely missed some more piece of information.


A and C could be the answers .

A = 2.31 * 47 = 108.57--->satisfies the condition given

C = 3.21 * 37 = 118.77--->satisfies the condition given.

You cant have 2 correct answers .

Thus this question either misses some information or the answer choices are not transcribed properly or ELSE something is really illegible to me here

Why didn't you try 47 in C? That was with no problem, legible!

sanju09 wrote:

rohan_vus wrote:This question is weird as there are 2 possible answers. So question has definitely missed some more piece of information.


A and C could be the answers .

A = 2.31 * 47 = 108.57--->satisfies the condition given

C = 3.21 * 37 = 118.77--->satisfies the condition given.

You cant have 2 correct answers .

Thus this question either misses some information or the answer choices are not transcribed properly or ELSE something is really illegible to me here

Why didn't you try 47 in C? That was with no problem, legible!

Yes "47 thingamajigs cost $1_8._7."..Did'nt see this '47'..seems "illegible" really got over on me