Study on the flyISEE UpperQuantitative ReasoningSequences and patterns
Quantitative Reasoning
Two families of questions fall under Sequences and patterns.
Arithmetic sequences add the same amount each step, so the nth term equals the first term plus n minus one times the common difference; forgetting the minus one gives an answer one step too far, and that value is usually offered. Repeating cycles rely on remainders: in a pattern that repeats every four items, the fortieth item matches the fourth, because forty divides evenly by four.
Other questions show a short sequence and ask which rule, such as doubling and then adding one, produces every term. Testing a rule on every given term avoids false matches.
Pick an answer to see whether it is right — nothing is saved, and nothing needs an account.
Question 1Easier
In an auditorium, the first row has 12 seats. Each row after the first has 2 more seats than the row before it. How many seats are in the 10th row?
Answer: C — 30
From row 1 to row 10, there are 9 increases. Each increase adds 2 seats, so the 10th row has seats.
Question 2Easier
A sequence begins , with the same operation used to obtain each term from the preceding term. Which sequence uses that same operation between consecutive terms?
Answer: C —
Each term in the given sequence is found by multiplying the previous term by 4 (, , ). Only is built by repeatedly multiplying by 4.
Question 3Easier
In a fictional town, the weather follows a strict 6-day repeating pattern, starting on Day 1: sunny, sunny, cloudy, rainy, cloudy, windy, and then the same six-day order repeats indefinitely. What is the weather on Day 50?
Answer: B — sunny
Dividing 50 by the cycle length 6 gives a remainder of 2 (since ), so Day 50 has the same weather as Day 2, which is sunny.
Every question is picked for where you are right now, wrong answers come back until they stick, and it all works offline.
Harder than the exam: ISEE Upper Challenge · Competition-style problems
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