Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 611 · 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.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Meera bought 3 balls and a bag for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹87 (c) not enough info (d) ₹90
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
5. 5.🧩 Ishaan bought 2 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹40 (c) ₹80 (d) not enough info
6. 6.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
7. 7.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) no mango is sweet (d) yes, it is certain
8. 8.🧩 Ananya is 6 years old. Saanvi is 8 years older than Ananya. How old is Saanvi? (a) not enough info (b) 15 (c) 8 (d) 14
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
12. 12.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
13. 13.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
14. 14.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
15. 15.🧩 Ananya is 6 years old. Rohan is 5 years older than Ananya. How old is Rohan? (a) not enough info (b) 5 (c) 12 (d) 11
16. 16.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
18. 18.🧩 Saanvi is 6 years old. Aarav is 4 years older than Saanvi. How old is Aarav? (a) 11 (b) 10 (c) 4 (d) not enough info
19. 19.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
20. 20.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 8 PM (c) not enough info (d) 7 PM
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
22. 22.🧩 Arjun bought 6 pens and a cap for ₹280 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹46 (c) ₹274 (d) ₹280
23. 23.🧩 Vihaan is 6 years old. Aarav is 4 years older than Vihaan. How old is Aarav? (a) 11 (b) not enough info (c) 10 (d) 4
24. 24.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
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
26. 26.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
27. 27.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
28. 28.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Nisha is 11 years old. Aarav is 3 years older than Nisha. How old is Aarav? (a) not enough info (b) 15 (c) 3 (d) 14
30. 30.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 32 (b) 12 (c) 36 (d) not enough info
31. 31.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
32. 32.🧩 A box has 3 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 24 (b) not enough info (c) 11 (d) 32
33. 33.🧩 Saanvi is 9 years old. Vihaan is 4 years older than Saanvi. How old is Vihaan? (a) 14 (b) 13 (c) 4 (d) not enough info
34. 34.🧩 Ishaan is 6 years old. Aarav is 3 years older than Ishaan. How old is Aarav? (a) 10 (b) not enough info (c) 9 (d) 3
35. 35.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
36. 36.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
38. 38.🧩 A box has 5 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 35 (b) 12 (c) 42 (d) not enough info
39. 39.🧩 Nisha is 10 years old. Ananya is 4 years older than Nisha. How old is Ananya? (a) 4 (b) not enough info (c) 15 (d) 14
40. 40.🧩 Ananya bought 3 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) ₹35 (c) ₹90 (d) not enough info

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