Numerical Problem Solving Flashcards
6 cards from real OC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Numerical Problem Solving flashcards as text
A book has 320 pages. Maya reads 1/4 on Monday and 2/5 on Tuesday. How many pages remain?
Answer: 112
Maya reads 80 + 128 = 208 pages, leaving 320 − 208 = 112 pages.
A plumber charges $50 for the first hour and $35 for each additional hour. What is the cost for 4 hours?
Answer: $155
$50 + (3 × $35) = $50 + $105 = $155.
If 6 pens cost $4.50, what is the cost of 10 pens?
Answer: $7.50
Each pen costs $4.50 ÷ 6 = $0.75, so 10 pens cost $7.50.
A container has 3.6 liters of juice poured equally into 8 cups. How much juice is in each cup?
Answer: 0.45 L
3.6 ÷ 8 = 0.45 liters per cup.
What is the smallest prime number greater than 20?
Answer: 23
23 is prime; 21 = 3 × 7 and 22 = 2 × 11 are not prime.
A shirt originally costs $60 and is sold at a 15% discount. What is the sale price?
Answer: $51
Discount = 15% × $60 = $9, so sale price = $60 − $9 = $51.
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