Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 951 · 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? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Ananya is 11 years old. Tara is older than Ananya. How old is Tara? (a) 12 (b) 13 (c) not enough info (d) 16
3. 3.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
4. 4.🧩 Ishaan is 10 years old. Ananya is 4 years older than Ishaan. How old is Ananya? (a) 4 (b) 14 (c) not enough info (d) 15
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.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) no mango is sweet (d) yes, it is certain
7. 7.🧩 A box has 4 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 12 (b) 32 (c) not enough info (d) 40
8. 8.🧩 Aarav is 8 years old. Ishaan is 7 years older than Aarav. How old is Ishaan? (a) not enough info (b) 15 (c) 16 (d) 7
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Diya bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) not enough info (c) ₹60 (d) ₹25
11. 11.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
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
13. 13.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
14. 14.🧩 Tara bought 5 balls and a cap for ₹95 in all. Each ball cost the same. What did one ball cost? (a) ₹19 (b) not enough info (c) ₹95 (d) ₹90
15. 15.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Diya is 6 years old. Aarav is 3 years older than Diya. How old is Aarav? (a) not enough info (b) 9 (c) 10 (d) 3
18. 18.🧩 Meera is 12 years old. Saanvi is 5 years older than Meera. How old is Saanvi? (a) 18 (b) 5 (c) not enough info (d) 17
19. 19.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
20. 20.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Aarav bought 2 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹40
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Arjun bought 2 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹40 (d) ₹80
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
25. 25.🧩 A box has 3 rows of apples, with 9 in each row. How many apples are in the box? (a) 12 (b) not enough info (c) 36 (d) 27
26. 26.🧩 Diya bought 5 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) ₹35 (c) ₹150 (d) not enough info
27. 27.🧩 Vihaan is 7 years old. Rohan is older than Vihaan. How old is Rohan? (a) 9 (b) not enough info (c) 8 (d) 12
28. 28.🧩 A box has 3 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 12 (b) 27 (c) 36 (d) not enough info
29. 29.🧩 Kabir bought 2 notebooks and a water bottle for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹128 (c) ₹65 (d) ₹130
30. 30.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Ishaan is 8 years old. Kabir is older than Ishaan. How old is Kabir? (a) 13 (b) 9 (c) 10 (d) not enough info
32. 32.🧩 Saanvi bought 2 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹30 (d) ₹35
33. 33.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
34. 34.🧩 A box has 4 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 10 (b) not enough info (c) 30 (d) 24
35. 35.🧩 Kabir bought 3 notebooks and a lunch box for ₹255 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹252 (c) ₹255 (d) ₹85
36. 36.🧩 Arjun bought 4 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹65 (b) not enough info (c) ₹240 (d) ₹60
37. 37.🧩 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
38. 38.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Tara is 6 years old. Ishaan is older than Tara. How old is Ishaan? (a) 7 (b) 8 (c) not enough info (d) 11
40. 40.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False

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