Two people measure each other’s height, the height of the taller person is H and the height of the other person is L. If the differences in their height are equal to their average height, what is the Value of H/L?
Answer(s): D
If the difference is equal to the average, then we could write the equation: H – L = (H+L)/2. H – 3L = 0 H/L = 3.
A student is studying for a test from 11:00 A.M to 20:00 P.M on weekdays and one third of that time on Saturdays, on Sundays he takes a break from school and goes fishing. For what fractional part of the entire week is the student studying?
Answer(s): C
On weekdays, the student studies for 9 hours, on Saturdays 3 hours. In one week the student studies for (5 x 9 + 3 = 48).The total number of hours in one week is (24 x 7 = 168). 48 hours / 168 total hours = 2/7.
An average teenager sleeps from 23:00 P.M till 7:30 in the morning of a schools night and on the weekend, which is Friday and Saturdays he sleeps 50% more each night. For what fraction part of the entire week is the teenager asleep?
In one week there are (24 x 7 =168) hours.The average teenager sleeps 8.5 hours on weekdays and (1.5 x 8.5 = 12.75) hours on the weekend. Altogether, the total sleeping time per one week is (8.5 x 5 + 12.75 x 2 = 68).The fractional part of the sleep is (68/168 = 17/42.
The number 12 bus is working from 6:00 in the morning to 10:00 P.M on weekdays only. On Saturdays and Sundays the bus goes to the garage 3 times a day for upgrading, each time for 3 hours. For what fraction part of the entire week is the bus on the road?
Answer(s): E
In one week there are (24 x 7 =168) hours.The bus is on the road everyday, on weekdays he is 16 hours on the road and on Saturdays and Sundays he drives for 9 hours each day. The total amount of hours is (16 x 5 + 18 = 98). The fraction part of the week is (98/168 = 7/12).
Lilac has three times more Barbie dolls than Orly. If Lilac gives 6 dolls to Nirit, she would have 21 dolls left. How many dolls does Orly have?
The easiest way to solve such problems is by back-solving it.Take answer C: If Orly has 9 dolls then Lilac has 27. If Lilac would give away 6 dolls she would really have 21 dolls left.
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