alleryStart learning →What is 15% of 320?
- 48
- 52
- 54
- 42
Show answer and solution
Correct answer: A. 48
0.15 x 320 = 48. Quick check: 10% = 32, 5% = 16, total = 48.
ITBP Arithmetic Algebra Mensuration — practice questions
Explore 31 free Arithmetic Algebra Mensuration questions in ITBP Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.
Practise Arithmetic Algebra Mensuration with Quill →Arithmetic Algebra Mensuration questions and exercises with answers
Showing questions 1–30 of 31.
What is 15% of 320?Read the answer and worked solution →If 30% of a number is 96, the number isRead the answer and worked solution →A number is first increased by 20% and then decreased by 20%. The net change isRead the answer and worked solution →If the price of sugar rises by 25%, by what percent must consumption fall to keep expenditure unchanged?Read the answer and worked solution →A's salary is 25% more than B's. By what percent is B's salary less than A's?Read the answer and worked solution →An article is sold for Rs 800 at a profit of 25%. The cost price isRead the answer and worked solution →By selling a watch for Rs 1080 a trader earns 8% profit. The CP isRead the answer and worked solution →A trader marks his goods 30% above CP and gives 10% discount. His profit per cent isRead the answer and worked solution →A shopkeeper marks goods 40% above CP. To earn a profit of 12% he should give a discount ofRead the answer and worked solution →If a : b = 3 : 4 and b : c = 5 : 7, then a : c isRead the answer and worked solution →Three numbers are in the ratio 2 : 3 : 5. Their sum is 200. The largest number isRead the answer and worked solution →If 4 men can do a job in 9 days, how many days will 6 men take?Read the answer and worked solution →The average of 9 numbers is 25. If one number, 35, is removed, the average of the remaining isRead the answer and worked solution →The average age of a class of 20 students is 16 years. When the teacher is included, the average rises to 17. The teacher's age isRead the answer and worked solution →The average of first five multiples of 3 isRead the answer and worked solution →A can do a piece of work in 12 days and B in 18 days. Together they finish it inRead the answer and worked solution →A train 150 m long crosses a platform 250 m long in 20 seconds. Its speed in km/h isRead the answer and worked solution →A boat goes 16 km downstream in 2 hours and returns upstream in 4 hours. The speed of stream isRead the answer and worked solution →A man walks at 5 km/h from home to office in 36 minutes. The distance isRead the answer and worked solution →The simple interest on Rs 6000 at 10% per annum for 2 years isRead the answer and worked solution →Compound interest on Rs 5000 at 10% per annum for 2 years (compounded annually) isRead the answer and worked solution →A sum of money doubles itself in 8 years at simple interest. The rate per annum isRead the answer and worked solution →If x + y = 12 and x - y = 4, then xy equalsRead the answer and worked solution →The sum of three consecutive natural numbers is 72. The middle number isRead the answer and worked solution →The smallest number divisible by both 12 and 18 isRead the answer and worked solution →The area of a circle with radius 7 cm is (use pi = 22/7)Read the answer and worked solution →The perimeter of a square is 36 cm. Its area isRead the answer and worked solution →The volume of a cube of side 4 cm isRead the answer and worked solution →In a right triangle with legs 5 cm and 12 cm, the hypotenuse isRead the answer and worked solution →Key in the arithmetic answerRead the answer and worked solution →
Worked practice questions
If 30% of a number is 96, the number is
- 280
- 320
- 340
- 360
Show answer and solution
Correct answer: B. 320
0.30 N = 96, so N = 320. Check: 30% of 320 = 96.
A number is first increased by 20% and then decreased by 20%. The net change is
- 4% decrease
- 4% increase
- No change
- 2% decrease
Show answer and solution
Correct answer: A. 4% decrease
**Successive percentage change:** a + b + ab/100 = 20 + (-20) + (20)(-20)/100 = -4%.
Equivalently, 1.20 x 0.80 = 0.96 = 4% decrease.
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