Skip to main content

Aptitude Day 326

Problems on Percentage:

1. A student’s mathematics test had 80 problems. i.e., 20 arithmetic, 40 algebra and 20 geometry problems.  Although she answered 60% of the arithmetic, 40% of the algebra and 40% of the geometry problems correctly, she did not pass the test because she got less than 60% of the problems right. How many more questions she would have needed to answer correctly to earn a 60% passing grade?

Solution:
                  Number of questions attended correctly = 60% of 20 + 40% of 40 + 40% of 20 
                                                                                   = 60/20 + 40/40 + 40/20
                                                                                   = 3+1+2 = 6.

                  60% of 80 = 48.

                   Required number of questions = 48-6 = 42.

2. If 60% of (x-y) = 40% of (x+y), then what percent of x is y?

Solution:
                 60/100*(x-y) = 40/100* (x+y)

                 By solving this equation, we get x = 5y.

                y/x * 100 = y/5y * 100 = 20%.



Comments

Post a Comment

Popular posts from this blog

Aptitude Day 5

Answers of Day 4 :   1. 9                                   2. 5                                   3. 9                                   4. 8 To find the unit digit in the product. This is similar to the last model where we will find the unit digit of the sum. Example: 432*459*28*48=? Solution:  2*9=18 , 8*8=64, 4*8= 32. The unit digit of the total product is 2.  Problems to solve Find the unit digit of the product in the following 1. 404*397*810*21 =? 2. 24*42*36*78 =? 3. 81*82*89 =? 4. 72*36*98*47 =? See you tomorrow friends... Check out the answers over here  Aptitude Day 6
Post a Comment
Read more

Vocabulary Day 82

Flutter Thesaurus: Verb: wave rapidly            drift, agitate, dance, flicker, fluctuate, hover, oscillate, quiver, shake, vibrate...                                           Antonyms:  stay, remain, stay . ..  Example sentences:         ·        His heart flutters when he sees his crush.  ·       That incident causes a  flutter between them. 
Post a Comment
Read more

Why Procrastinating for the first time is good for you?

    Why Procrastinating for the first time is good for you?       Hello everyone. What's up? Are you working on your goals effectively? Hope you're doing well. Let's get into the topic  Why Procrastinating for the first time is good for you? . . . Curious... Isn't it?          As I told you in my earlier post , I've learnt a lot in the last year. Today's post is about the things which I've learnt after I procrastinated my works. Not only I've learnt a few things but also I've developed some good attitudes. I've listed a few. ·         You'll come to know your capacity  ·         You'll overcome your laziness ·         You'll push into the habit of prioritizing even if you're really bad at it ·         You'll get to know your best time management skills ...
Post a Comment
Read more