Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 54 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) not enough info (c) 14 (d) 70
2. 2.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
3. 3.🧩 Rohan is 8 years old. Vihaan is 2 years older than Rohan. How old is Vihaan? (a) 10 (b) not enough info (c) 2 (d) 11
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 9 (b) not enough info (c) 20 (d) 25
6. 6.🧩 Tara bought 2 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹30 (c) ₹20 (d) ₹15
7. 7.🧩 Nisha is 9 years old. Rohan is 2 years older than Nisha. How old is Rohan? (a) 2 (b) not enough info (c) 11 (d) 12
8. 8.🧩 Kabir is 9 years old. Arjun is older than Kabir. How old is Arjun? (a) 11 (b) 10 (c) 14 (d) not enough info
9. 9.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a loud opinion (d) a rumour
10. 10.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
12. 12.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) 50 (c) not enough info (d) 5
13. 13.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
14. 14.🧩 Saanvi bought 5 balls and a cap for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹270 (b) not enough info (c) ₹54 (d) ₹265
15. 15.🧩 Ishaan is 11 years old. Aarav is 9 years older than Ishaan. How old is Aarav? (a) 21 (b) not enough info (c) 9 (d) 20
16. 16.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
17. 17.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
18. 18.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
19. 19.🧩 A box has 6 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 35 (b) 30 (c) 11 (d) not enough info
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) all dogs are mean (d) dogs hate you
21. 21.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 6 PM
23. 23.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
24. 24.🧩 Aarav bought 3 kites and a cap for ₹230 in all. Each kite cost the same. What did one kite cost? (a) ₹230 (b) not enough info (c) ₹76 (d) ₹227
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
26. 26.🧩 Ishaan is 6 years old. Aarav is older than Ishaan. How old is Aarav? (a) 11 (b) not enough info (c) 7 (d) 8
27. 27.🧩 Nisha bought 2 mangoes for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) ₹25 (c) not enough info (d) ₹30
28. 28.🧩 Kabir is 10 years old. Arjun is older than Kabir. How old is Arjun? (a) 11 (b) 12 (c) not enough info (d) 15
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
32. 32.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 9 PM (d) 8 PM
33. 33.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 8 PM
34. 34.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
36. 36.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 72 (b) 16 (c) not enough info (d) 64
37. 37.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 30 (b) 10 (c) 25 (d) not enough info
38. 38.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
39. 39.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 6 PM
40. 40.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more

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