IGET
IGET MCQ · Tests · Exam Prep
Quiz Start PYQ NEW

Medical & Engg

NEET UG JEE Main Campus Placement

Govt Exams

All Govt. Exams UPSC & Civil Svc SSC Exams Banking Exams Railway Exams Defence Exams State PSC

Teacher Exams

All Teacher Exams Central-Level State-Level TET

Subjects

Quantitative Aptitude1,106 C Programming1,000 Java Programming958 Placement Papers654 English Language495 Bank PO / Clerk / RBI494 View All Subjects

Quick Links

Online Tests PYQ Bank Current Affairs Exam Schedule
Home › Subjects › Quantitative Aptitude › Numbers

Quantitative Aptitude
Numbers

Quantitative aptitude questions for competitive exams

500 Q 7 Topics Take Test
Advertisement
Difficulty: All Easy Medium Hard 81–90 of 500
Topics in Quantitative Aptitude
Q.81 Medium Numbers
A product's price increased by 25%, then decreased by 20%. What is the net change?
A 0% (no change)
B +5%
C -5%
D +10%
Correct Answer:  B. +5%
EXPLANATION

Let original price = 100. After 25% increase = 125. After 20% decrease = 125 × 80/100 = 100. Net = +5% gain

Take Test
Q.82 Medium Numbers
A boat goes 30 km upstream in 6 hours and 30 km downstream in 3 hours. What is the speed of the boat in still water?
A 7.5 km/h
B 6.5 km/h
C 8 km/h
D 5 km/h
Correct Answer:  A. 7.5 km/h
EXPLANATION

Upstream speed = 30/6 = 5 km/h. Downstream speed = 30/3 = 10 km/h. Boat speed = (5+10)/2 = 7.5 km/h

Take Test
Q.83 Medium Numbers
Rs. 1000 is invested at 10% per annum compound interest for 2 years. What is the final amount?
A Rs. 1210
B Rs. 1200
C Rs. 1100
D Rs. 1320
Correct Answer:  A. Rs. 1210
EXPLANATION

Amount = 1000(1 + 10/100)² = 1000 × 1.1 × 1.1 = Rs. 1210

Take Test
Q.84 Medium Numbers
X and Y together can complete a work in 18 days. X alone can complete it in 30 days. In how many days can Y alone complete the work?
A 45 days
B 38 days
C 42 days
D 35 days
Correct Answer:  A. 45 days
EXPLANATION

Y's rate = 1/18 - 1/30 = 5/90 - 3/90 = 2/90 = 1/45. Y can complete in 45 days

Take Test
Q.85 Easy Numbers
A man buys goods for Rs. 2500 and sells them at a loss of 8%. What is the selling price?
A Rs. 2300
B Rs. 2200
C Rs. 2400
D Rs. 2100
Correct Answer:  A. Rs. 2300
EXPLANATION

Selling Price = 2500 × 92/100 = Rs. 2300

Take Test
Q.86 Easy Numbers
If a number is decreased by 40%, it becomes 300. What is the original number?
A 500
B 420
C 480
D 550
Correct Answer:  A. 500
EXPLANATION

Let original number be x. x × 60/100 = 300. x = 300 × 100/60 = 500

Take Test
Q.87 Easy Numbers
A boat's speed in still water is 12 km/h and the speed of current is 3 km/h. How long will it take to travel 60 km downstream?
A 4 hours
B 3.75 hours
C 5 hours
D 4.5 hours
Correct Answer:  A. 4 hours
EXPLANATION

Downstream speed = 12 + 3 = 15 km/h. Time = 60/15 = 4 hours

Take Test
Q.88 Easy Numbers
A train 250m long crosses a platform 150m long in 20 seconds. What is the speed of the train?
A 54 km/h
B 72 km/h
C 45 km/h
D 60 km/h
Correct Answer:  B. 72 km/h
EXPLANATION

Distance covered = 250 + 150 = 400m. Speed = 400/20 = 20 m/s = 20 × 18/5 = 72 km/h

Take Test
Q.89 Easy Numbers
Two pipes A and B can fill a tank in 12 hours and 15 hours respectively. If both pipes are opened together, in how many hours will the tank be filled?
A 6.67 hours
B 5.5 hours
C 7.5 hours
D 8 hours
Correct Answer:  A. 6.67 hours
EXPLANATION

Combined rate = 1/12 + 1/15 = 5/60 + 4/60 = 9/60 = 3/20. Time = 20/3 = 6.67 hours

Take Test
Q.90 Easy Numbers
A shopkeeper marks an item at Rs. 500. He gives a discount of 20% and still makes a profit of 25%. What is the cost price?
A Rs. 320
B Rs. 400
C Rs. 350
D Rs. 380
Correct Answer:  A. Rs. 320
EXPLANATION

Selling Price = 500 × 80/100 = Rs. 400. If profit is 25%, then CP = 400 × 100/125 = Rs. 320

Take Test
IGET
iget AI
Online · Ask anything about exams
Hi! 👋 I'm your iget AI assistant.

Ask me anything about exam prep, MCQ solutions, study tips, or strategies! 🎯
UPSC strategy SSC CGL syllabus Improve aptitude NEET Biology tips