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1) Frank buys a mobile phone with blue tooth online for $400/-.He gets an instant rebate of 7% & He needs to pay 5% of the final cost for shipping & taxes. How much frank needs to part away for the mobile phone.A) 390.80 B) 388.20 C) 389.20 D) 390.60
Answer & Explanation
Answer: 390.60 (Cost of the mobile phone after rebate : 400-400*7/100 = $372/-
Final cost including shipping & taxes : 372 + 372*5/100 =$390.60/-
Shortcut :
Final cost = (93/100) * (105/100) * 400 = $390.60/-
)
2) In an election between three candidates, A got 45% of the total valid votes, 2% of the total votes were invalid.
B got 25% of total valid votes. Total no of votes polled is 20000.How many valid votes c got?A) 2640 B) 5880 C) 5500 D) 5000
Answer & Explanation
Answer: 5880 (Total no of valid votes : 20000 - 20000 *2/100 = 19600
C got : 19600 * 30/100 = 5880 votes
That is : (98/100) * (30/100)* 20000 = 5880 votes
)
3) John buys a shirt for $200/- After discount he gets it for $175/-?
What is the discount percentage?A) 12.5% B) 13.5% C) 10% D) 15%
Answer & Explanation
Answer: 12.5% (Actual discount : $25/-
Percentage of Discount : (25/200) * 100 = 12.5%
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4) A shop keeper pays 3 of his employees Jan, Jen, Jaz a total of $470 a week.
If Jan gets 125% of what Jen gets & 75% of what Jaz gets. How much Jan makes a week?
A) $130 B) $200 C) $175 D) $150
Answer & Explanation
Answer: $150 (Jan + Jen + Jaz = 470
Jan + Jan * 100/125 + Jan *100/ 75 = 470
Jan * (1+ 4/5+ 4/3) = 470
Jan = 470 *15/47 = $150
Jan makes $150 a week.
)
5) Ajay spends 30% of his income on rent, 30% of his income on food & recreation & 5% of his income on mobile phone bill.
If his income increases by 25% he spends 20% more on recreation, what will be the net percent increase on his savings?
A) 2.6% B) 2.75% C) 37.60% D) 38.75%
Answer & Explanation
Answer: 2.6% (Ajay spends 65% & saves 35% of his income.
Let's assume Ajay earns $100.
He saves $35.
If his income increases by 25%, his income would be 100 + 100 *25/100 = 1.25 *100 = $125
If he spends 20% more after increase , his total expenditure would be 65 + 65 *20/100 = $78
His total savings would be $125 - $78 = $47
Total increase in savings would be 47/125 *100 - 35 = 37.6 - 35 = 2.6%
Net percentage increase on his savings would be 2.6%
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