Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 772 · 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: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
3. 3.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 12 (c) 42 (d) 36
4. 4.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
5. 5.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Tara bought 2 kites for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) not enough info (c) ₹35 (d) ₹40
7. 7.🧩 Vihaan bought 4 mangoes and a lunch box for ₹220 in all. Each mango cost the same. What did one mango cost? (a) ₹216 (b) ₹55 (c) not enough info (d) ₹220
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
15. 15.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
16. 16.🧩 A box has 5 rows of apples, with 5 in each row. How many apples are in the box? (a) 30 (b) 10 (c) not enough info (d) 25
17. 17.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
18. 18.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Saanvi is 9 years old. Kabir is 6 years older than Saanvi. How old is Kabir? (a) not enough info (b) 15 (c) 16 (d) 6
22. 22.🧩 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
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
24. 24.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 9 PM
25. 25.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
26. 26.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
27. 27.🧩 Saanvi is 8 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) not enough info (b) 9 (c) 13 (d) 10
28. 28.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 8 PM
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
30. 30.🥭 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) yes, it is certain (d) no mango is sweet
31. 31.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) 60 (c) 12 (d) not enough info
32. 32.🧩 Kabir is 10 years old. Ishaan is older than Kabir. How old is Ishaan? (a) not enough info (b) 15 (c) 11 (d) 12
33. 33.🧩 Ishaan bought 3 mangoes and a water bottle for ₹220 in all. Each mango cost the same. What did one mango cost? (a) ₹73 (b) ₹217 (c) not enough info (d) ₹220
34. 34.🧩 Diya is 9 years old. Kabir is older than Diya. How old is Kabir? (a) 14 (b) not enough info (c) 10 (d) 11
35. 35.🧩 Ishaan is 11 years old. Ananya is older than Ishaan. How old is Ananya? (a) 12 (b) not enough info (c) 13 (d) 16
36. 36.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
37. 37.🧩 Rohan bought 4 balls and a water bottle for ₹220 in all. Each ball cost the same. What did one ball cost? (a) ₹216 (b) ₹220 (c) not enough info (d) ₹55
38. 38.🧩 A box has 6 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 56 (b) 48 (c) not enough info (d) 14
39. 39.🧩 Aarav bought 6 mangoes and a lunch box for ₹250 in all. Each mango cost the same. What did one mango cost? (a) ₹41 (b) ₹250 (c) ₹244 (d) not enough info
40. 40.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 4 PM

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