Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 207 · 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.🧩 Rohan is 7 years old. Saanvi is 2 years older than Rohan. How old is Saanvi? (a) 2 (b) 9 (c) 10 (d) not enough info
2. 2.🧩 Ananya is 11 years old. Nisha is older than Ananya. How old is Nisha? (a) 12 (b) 13 (c) not enough info (d) 16
3. 3.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a loud opinion (d) a rumour
4. 4.🧩 A box has 7 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 56 (b) 14 (c) not enough info (d) 49
5. 5.🥭 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
6. 6.🧩 Rohan bought 2 markers and a cap for ₹130 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹130 (c) ₹128 (d) ₹65
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
8. 8.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
10. 10.🧩 Saanvi bought 4 pens and a lunch box for ₹280 in all. Each pen cost the same. What did one pen cost? (a) ₹276 (b) ₹280 (c) not enough info (d) ₹70
11. 11.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Saanvi bought 5 markers and a lunch box for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹54 (b) ₹265 (c) not enough info (d) ₹270
13. 13.🧩 Aarav is 6 years old. Arjun is 8 years older than Aarav. How old is Arjun? (a) 8 (b) 15 (c) not enough info (d) 14
14. 14.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
15. 15.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
16. 16.🧩 Diya is 8 years old. Kabir is 3 years older than Diya. How old is Kabir? (a) 3 (b) 11 (c) not enough info (d) 12
17. 17.🧩 Aarav is 7 years old. Nisha is older than Aarav. How old is Nisha? (a) 12 (b) 9 (c) not enough info (d) 8
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
19. 19.🧩 Tara is 12 years old. Meera is 5 years older than Tara. How old is Meera? (a) 5 (b) not enough info (c) 18 (d) 17
20. 20.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
22. 22.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
23. 23.🧩 A box has 8 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 13 (b) not enough info (c) 45 (d) 40
24. 24.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
25. 25.🧩 A box has 5 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 25 (b) not enough info (c) 10 (d) 30
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
28. 28.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 6 PM (c) 3 PM (d) not enough info
29. 29.🧩 A box has 3 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 11 (b) 32 (c) 24 (d) not enough info
30. 30.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
31. 31.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
32. 32.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
33. 33.🧩 Saanvi is 8 years old. Tara is 2 years older than Saanvi. How old is Tara? (a) not enough info (b) 11 (c) 10 (d) 2
34. 34.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
35. 35.🧩 Rohan bought 3 notebooks for ₹105 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹35 (c) ₹40 (d) ₹105
36. 36.🧩 Ananya bought 2 kites and a water bottle for ₹60 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹58 (d) ₹60
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
38. 38.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
39. 39.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
40. 40.🧩 Rohan bought 5 markers for ₹225 in all. Each marker cost the same. What did one marker cost? (a) ₹225 (b) ₹50 (c) not enough info (d) ₹45

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