Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 636 · 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.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Arjun bought 2 markers and a water bottle for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹100 (b) ₹98 (c) not enough info (d) ₹50
3. 3.🧩 Tara is 8 years old. Nisha is older than Tara. How old is Nisha? (a) 9 (b) 10 (c) not enough info (d) 13
4. 4.🧩 Ananya is 10 years old. Diya is 6 years older than Ananya. How old is Diya? (a) 16 (b) not enough info (c) 6 (d) 17
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
6. 6.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) 5 PM (d) not enough info
7. 7.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) not enough info (b) 40 (c) 8 (d) 4
8. 8.🧩 Kabir bought 2 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹15 (d) ₹20
9. 9.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 24 (b) not enough info (c) 28 (d) 10
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? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
12. 12.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
13. 13.🧩 Diya is 11 years old. Saanvi is older than Diya. How old is Saanvi? (a) not enough info (b) 12 (c) 13 (d) 16
14. 14.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
15. 15.🧩 A box has 3 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 36 (d) 27
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
18. 18.🥭 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, it is certain (c) no mango is sweet (d) yes, mangoes match
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
20. 20.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
21. 21.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
22. 22.🧩 Kabir bought 2 markers and a lunch box for ₹110 in all. Each marker cost the same. What did one marker cost? (a) ₹110 (b) not enough info (c) ₹55 (d) ₹108
23. 23.📊 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
24. 24.🧩 Ananya is 11 years old. Ishaan is older than Ananya. How old is Ishaan? (a) 16 (b) 13 (c) not enough info (d) 12
25. 25.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 24 (b) 20 (c) not enough info (d) 9
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
27. 27.🧩 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
28. 28.🧩 Rohan bought 2 notebooks and a water bottle for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹85 (c) ₹170 (d) ₹168
29. 29.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
30. 30.🧩 A box has 3 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 7 (b) not enough info (c) 16 (d) 12
31. 31.🧩 Kabir is 7 years old. Tara is 3 years older than Kabir. How old is Tara? (a) not enough info (b) 3 (c) 11 (d) 10
32. 32.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
33. 33.🧩 Rohan bought 6 pens and a bag for ₹90 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹84 (c) ₹15 (d) ₹90
34. 34.🧩 Nisha bought 5 markers and a water bottle for ₹335 in all. Each marker cost the same. What did one marker cost? (a) ₹330 (b) ₹335 (c) ₹67 (d) not enough info
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
36. 36.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
37. 37.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Tara is 11 years old. Saanvi is 9 years older than Tara. How old is Saanvi? (a) 20 (b) not enough info (c) 21 (d) 9
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False

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